Improvement in clamps for holding saws



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UNITED STATES PATENT OFFICEQ JESSE BRIGGS, OF STUYVESANT, NEW YORK.

IMPROVEMENT IN CLAMPS FOR HOLDING SAWS.

To all whom it may concern:

Beit known that I, JESSE BRIGGS, of Stuyvesant, in the county ofColumbia and State of New York, have invented a new and Improved Clampfor Holding Saws while being Filed; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, which willenable those skilled in the art to make and use the same, referencebeing nad to the accompanying drawings, forming part of thisspecification, in which- Figure lis a side view of myinvention, partlyin section, as indicated by the line x a', Fig. 2 5 Fig. 2, a plan ortop view of the same.

Similar letters of reference indicate like parts.

This invention relates to a new and improved clamp for holding sawswhile being sharpened or filed.

rI he object of" the invention is to obtain a simple and cheap implementfor the purpose specied, and one which may be very readily manipulated.

The implement or device is composed of two parts, A A', which may betermed frames," and they are ot' right-angular form, the lower parts, a,being ot' Vshape, and the upper parts being each composed of twouprights, b b, connected at their upper ends by bars B B', which serveas jaws to clamp the saw-blade.

The part A, at its bend or angle at each side, is provided with alateral projecting pin, c, and the other part, A', is provided at eachside, at corresponding points, with a hook-projection, c' and theseprojections are fitted over the pins c, on which they work as fulcra.(See Fig. l.)

On the rear of the part or frame A' of the device there is fitted a cam,O, provided with a handle or lever, D, said cam bearing or workingagainst the rear of the frame A.

The jaws B B are opened and closed by operating the cam C. Vhen thehandle or lever D is shoved or drawn toward the jaws B B', as indicatedin red, Fig. 1, the jaws B B' will be closed so as to clamp lrmly thesawblade, and when said handle or lever is moved in the oppositedirection the jaws will be opened, as shown in black.

The two parts or frames A A' may each be cast in one piece and adjustedtogether with out any trouble or work whatever.

The cam and handle may be of wrought or malleable cast-iron.

rlhe expense of manufacture., it will be seen, will be extremely small.

The frame A may be cast with a cross-bar, I

a', havinga hole in it for a screw to pass through in order to securethe device to any fixture.

I claim as new and desire to secure by Letters Patent- The constructionand arrangement of the frames A A', jaws B B', hook-projections c', pinsc, cam O, and lever D, in the manner herein described and represented.

JESSE BRIGGS.

Witnesses:

IsAAc N. COLLIER, ARTHUR BARTON.

